Jasmine Allen broke the five-metre barrier for the first time when winning the Anglian Schools junior girls long jump title at Norwich on Saturday.
The 13-year-old improved her own Bourne Grammar School record when leaping 5.02m.
Allen, a member of Nene Valley Harriers, also ran a superb lead-off leg as Lincolnshire won the 4x100m.
The teenager, who still has one year left in the junior girls age group, was one of seven Bourne Grammar athletes in the Lincolnshire team.
Other Bourne Grammar athletes to make the podium were Tom Lavender, who finished third in the junior boys 80m hurdles in 13.4, and Billy Mugnier, who took bronze in the senior boys 3000m in 10:11.9.
In the inter boys age group, Reid Davidson found himself in a very fast 200m race and ran strongly to finish fourth in 24.1 while Scott Buxton was also fourth with 1.60m in the high jump.
In the throws, Millie Bristow finished fifth in the inter girls javelin with 23.54m and Chloe Ladley gained valuable experience in the junior girls shot with 8.04m.
Lincolnshire have named their team for the English Schools Championships in Birmingham next month with the inter boys team featuring local aces Ashley Sandall, Alex Hampson, Jamie Horne, Robbie Shaw, Ben Stephens.
Hampson won the Anglian Schools 1500m title on Saturday in 4.08.8, Sandall blasted to yet another 400m success in 49.4, while Stephens won the shot with 14.09 where Shaw was fifth with 11.72m.
Horne improved his PB to 1.99 when 10th in the high jump at the English Under 20 Championships.
In the senior girls age group, local aces Lily Hughes and Emma Hornsby have both made the team.
Hornsby has enjoyed a fine season in the high jump this year while Hughes – whose younger brother William has also been named in the junior boys age group – set a PB of 12.88 for fifth place in the heats of the 100m at the South of England Championships.
She also competed in the 200m where she clocked 25.62 while Rosie Fresen, who was second in the hammer at Norwich with 32.17, made the junior girls team.
n Spalding athlete John Pike was runner-up in the second race of the Peterborough 5k Series.
Pike, a former winner of the series, clocked 15:59 at Eye as international ace Aaron Scott won in 15:23.